5 6x3 8 2 July 8, 2019 16 32 64 128 3 5 8 x 6 1 2 envelope 6 5 8 x 3 1 2 27 9 x ) 6 5 3 8 5 2 x 8 3 x 6 25 18 3 2 8 5 x 3 6 8 x 3 )+ 5 2x 6 9 5 8 3 x 2 6 5/8 x 6 x 6 5 6 - 3 8 5 6×2 8